proprietary components status

CPU Microcode (optional?)

VGA option rom (optional): without it you will get no graphics during early boot, old kernel versions(like the one in trisquel 6) are able to initializes the intel graphic card. Note that the replacement doesn't work yet with seabios but works with grub(as a payload) or libpayload based payloads.

EC(Embedded Controller) => you do not have to touch it(just leave it where it is)

<phcoder> GNUtoo-x60: in this case it looks like same range is declared twice in DSDT/SSDT

Features

nvramtool

Without the VGA optiorn rom nvramtool says:

# ./nvramtool -a
nvramtool: coreboot table not found. coreboot does not appear to
be installed on this system. Scanning for the table produced the
following results:
0 valid signatures were found with bad header checksums.
0 valid headers were found with bad table checksums.